The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 1 | |
| 2 | /* png.c - location for general purpose libpng functions |
| 3 | * |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 4 | * Last changed in libpng 1.2.37 [June 4, 2009] |
| 5 | * Copyright (c) 1998-2009 Glenn Randers-Pehrson |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 6 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 7 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 8 | * |
| 9 | * This code is released under the libpng license. |
| 10 | * For conditions of distribution and use, see the disclaimer |
| 11 | * and license in png.h |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 12 | */ |
| 13 | |
| 14 | #define PNG_INTERNAL |
| 15 | #define PNG_NO_EXTERN |
| 16 | #include "png.h" |
| 17 | |
| 18 | /* Generate a compiler error if there is an old png.h in the search path. */ |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 19 | typedef version_1_2_38 Your_png_h_is_not_version_1_2_38; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 20 | |
| 21 | /* Version information for C files. This had better match the version |
| 22 | * string defined in png.h. */ |
| 23 | |
| 24 | #ifdef PNG_USE_GLOBAL_ARRAYS |
| 25 | /* png_libpng_ver was changed to a function in version 1.0.5c */ |
| 26 | PNG_CONST char png_libpng_ver[18] = PNG_LIBPNG_VER_STRING; |
| 27 | |
| 28 | #ifdef PNG_READ_SUPPORTED |
| 29 | |
| 30 | /* png_sig was changed to a function in version 1.0.5c */ |
| 31 | /* Place to hold the signature string for a PNG file. */ |
| 32 | PNG_CONST png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10}; |
| 33 | #endif /* PNG_READ_SUPPORTED */ |
| 34 | |
| 35 | /* Invoke global declarations for constant strings for known chunk types */ |
| 36 | PNG_IHDR; |
| 37 | PNG_IDAT; |
| 38 | PNG_IEND; |
| 39 | PNG_PLTE; |
| 40 | PNG_bKGD; |
| 41 | PNG_cHRM; |
| 42 | PNG_gAMA; |
| 43 | PNG_hIST; |
| 44 | PNG_iCCP; |
| 45 | PNG_iTXt; |
| 46 | PNG_oFFs; |
| 47 | PNG_pCAL; |
| 48 | PNG_sCAL; |
| 49 | PNG_pHYs; |
| 50 | PNG_sBIT; |
| 51 | PNG_sPLT; |
| 52 | PNG_sRGB; |
| 53 | PNG_tEXt; |
| 54 | PNG_tIME; |
| 55 | PNG_tRNS; |
| 56 | PNG_zTXt; |
| 57 | |
| 58 | #ifdef PNG_READ_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 59 | /* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 60 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 61 | /* Start of interlace block */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 62 | PNG_CONST int FARDATA png_pass_start[] = {0, 4, 0, 2, 0, 1, 0}; |
| 63 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 64 | /* Offset to next interlace block */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 65 | PNG_CONST int FARDATA png_pass_inc[] = {8, 8, 4, 4, 2, 2, 1}; |
| 66 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 67 | /* Start of interlace block in the y direction */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 68 | PNG_CONST int FARDATA png_pass_ystart[] = {0, 0, 4, 0, 2, 0, 1}; |
| 69 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 70 | /* Offset to next interlace block in the y direction */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 71 | PNG_CONST int FARDATA png_pass_yinc[] = {8, 8, 8, 4, 4, 2, 2}; |
| 72 | |
| 73 | /* Height of interlace block. This is not currently used - if you need |
| 74 | * it, uncomment it here and in png.h |
| 75 | PNG_CONST int FARDATA png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; |
| 76 | */ |
| 77 | |
| 78 | /* Mask to determine which pixels are valid in a pass */ |
| 79 | PNG_CONST int FARDATA png_pass_mask[] = {0x80, 0x08, 0x88, 0x22, 0xaa, 0x55, 0xff}; |
| 80 | |
| 81 | /* Mask to determine which pixels to overwrite while displaying */ |
| 82 | PNG_CONST int FARDATA png_pass_dsp_mask[] |
| 83 | = {0xff, 0x0f, 0xff, 0x33, 0xff, 0x55, 0xff}; |
| 84 | |
| 85 | #endif /* PNG_READ_SUPPORTED */ |
| 86 | #endif /* PNG_USE_GLOBAL_ARRAYS */ |
| 87 | |
| 88 | /* Tells libpng that we have already handled the first "num_bytes" bytes |
| 89 | * of the PNG file signature. If the PNG data is embedded into another |
| 90 | * stream we can set num_bytes = 8 so that libpng will not attempt to read |
| 91 | * or write any of the magic bytes before it starts on the IHDR. |
| 92 | */ |
| 93 | |
| 94 | #ifdef PNG_READ_SUPPORTED |
| 95 | void PNGAPI |
| 96 | png_set_sig_bytes(png_structp png_ptr, int num_bytes) |
| 97 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 98 | if (png_ptr == NULL) |
| 99 | return; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 100 | png_debug(1, "in png_set_sig_bytes"); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 101 | if (num_bytes > 8) |
| 102 | png_error(png_ptr, "Too many bytes for PNG signature."); |
| 103 | |
| 104 | png_ptr->sig_bytes = (png_byte)(num_bytes < 0 ? 0 : num_bytes); |
| 105 | } |
| 106 | |
| 107 | /* Checks whether the supplied bytes match the PNG signature. We allow |
| 108 | * checking less than the full 8-byte signature so that those apps that |
| 109 | * already read the first few bytes of a file to determine the file type |
| 110 | * can simply check the remaining bytes for extra assurance. Returns |
| 111 | * an integer less than, equal to, or greater than zero if sig is found, |
| 112 | * respectively, to be less than, to match, or be greater than the correct |
| 113 | * PNG signature (this is the same behaviour as strcmp, memcmp, etc). |
| 114 | */ |
| 115 | int PNGAPI |
| 116 | png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check) |
| 117 | { |
| 118 | png_byte png_signature[8] = {137, 80, 78, 71, 13, 10, 26, 10}; |
| 119 | if (num_to_check > 8) |
| 120 | num_to_check = 8; |
| 121 | else if (num_to_check < 1) |
| 122 | return (-1); |
| 123 | |
| 124 | if (start > 7) |
| 125 | return (-1); |
| 126 | |
| 127 | if (start + num_to_check > 8) |
| 128 | num_to_check = 8 - start; |
| 129 | |
| 130 | return ((int)(png_memcmp(&sig[start], &png_signature[start], num_to_check))); |
| 131 | } |
| 132 | |
| 133 | #if defined(PNG_1_0_X) || defined(PNG_1_2_X) |
| 134 | /* (Obsolete) function to check signature bytes. It does not allow one |
| 135 | * to check a partial signature. This function might be removed in the |
| 136 | * future - use png_sig_cmp(). Returns true (nonzero) if the file is PNG. |
| 137 | */ |
| 138 | int PNGAPI |
| 139 | png_check_sig(png_bytep sig, int num) |
| 140 | { |
| 141 | return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num)); |
| 142 | } |
| 143 | #endif |
| 144 | #endif /* PNG_READ_SUPPORTED */ |
| 145 | |
| 146 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
| 147 | /* Function to allocate memory for zlib and clear it to 0. */ |
| 148 | #ifdef PNG_1_0_X |
| 149 | voidpf PNGAPI |
| 150 | #else |
| 151 | voidpf /* private */ |
| 152 | #endif |
| 153 | png_zalloc(voidpf png_ptr, uInt items, uInt size) |
| 154 | { |
| 155 | png_voidp ptr; |
| 156 | png_structp p=(png_structp)png_ptr; |
| 157 | png_uint_32 save_flags=p->flags; |
| 158 | png_uint_32 num_bytes; |
| 159 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 160 | if (png_ptr == NULL) |
| 161 | return (NULL); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 162 | if (items > PNG_UINT_32_MAX/size) |
| 163 | { |
| 164 | png_warning (p, "Potential overflow in png_zalloc()"); |
| 165 | return (NULL); |
| 166 | } |
| 167 | num_bytes = (png_uint_32)items * size; |
| 168 | |
| 169 | p->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; |
| 170 | ptr = (png_voidp)png_malloc((png_structp)png_ptr, num_bytes); |
| 171 | p->flags=save_flags; |
| 172 | |
| 173 | #if defined(PNG_1_0_X) && !defined(PNG_NO_ZALLOC_ZERO) |
| 174 | if (ptr == NULL) |
| 175 | return ((voidpf)ptr); |
| 176 | |
| 177 | if (num_bytes > (png_uint_32)0x8000L) |
| 178 | { |
| 179 | png_memset(ptr, 0, (png_size_t)0x8000L); |
| 180 | png_memset((png_bytep)ptr + (png_size_t)0x8000L, 0, |
| 181 | (png_size_t)(num_bytes - (png_uint_32)0x8000L)); |
| 182 | } |
| 183 | else |
| 184 | { |
| 185 | png_memset(ptr, 0, (png_size_t)num_bytes); |
| 186 | } |
| 187 | #endif |
| 188 | return ((voidpf)ptr); |
| 189 | } |
| 190 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 191 | /* Function to free memory for zlib */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 192 | #ifdef PNG_1_0_X |
| 193 | void PNGAPI |
| 194 | #else |
| 195 | void /* private */ |
| 196 | #endif |
| 197 | png_zfree(voidpf png_ptr, voidpf ptr) |
| 198 | { |
| 199 | png_free((png_structp)png_ptr, (png_voidp)ptr); |
| 200 | } |
| 201 | |
| 202 | /* Reset the CRC variable to 32 bits of 1's. Care must be taken |
| 203 | * in case CRC is > 32 bits to leave the top bits 0. |
| 204 | */ |
| 205 | void /* PRIVATE */ |
| 206 | png_reset_crc(png_structp png_ptr) |
| 207 | { |
| 208 | png_ptr->crc = crc32(0, Z_NULL, 0); |
| 209 | } |
| 210 | |
| 211 | /* Calculate the CRC over a section of data. We can only pass as |
| 212 | * much data to this routine as the largest single buffer size. We |
| 213 | * also check that this data will actually be used before going to the |
| 214 | * trouble of calculating it. |
| 215 | */ |
| 216 | void /* PRIVATE */ |
| 217 | png_calculate_crc(png_structp png_ptr, png_bytep ptr, png_size_t length) |
| 218 | { |
| 219 | int need_crc = 1; |
| 220 | |
| 221 | if (png_ptr->chunk_name[0] & 0x20) /* ancillary */ |
| 222 | { |
| 223 | if ((png_ptr->flags & PNG_FLAG_CRC_ANCILLARY_MASK) == |
| 224 | (PNG_FLAG_CRC_ANCILLARY_USE | PNG_FLAG_CRC_ANCILLARY_NOWARN)) |
| 225 | need_crc = 0; |
| 226 | } |
| 227 | else /* critical */ |
| 228 | { |
| 229 | if (png_ptr->flags & PNG_FLAG_CRC_CRITICAL_IGNORE) |
| 230 | need_crc = 0; |
| 231 | } |
| 232 | |
| 233 | if (need_crc) |
| 234 | png_ptr->crc = crc32(png_ptr->crc, ptr, (uInt)length); |
| 235 | } |
| 236 | |
| 237 | /* Allocate the memory for an info_struct for the application. We don't |
| 238 | * really need the png_ptr, but it could potentially be useful in the |
| 239 | * future. This should be used in favour of malloc(png_sizeof(png_info)) |
| 240 | * and png_info_init() so that applications that want to use a shared |
| 241 | * libpng don't have to be recompiled if png_info changes size. |
| 242 | */ |
| 243 | png_infop PNGAPI |
| 244 | png_create_info_struct(png_structp png_ptr) |
| 245 | { |
| 246 | png_infop info_ptr; |
| 247 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 248 | png_debug(1, "in png_create_info_struct"); |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 249 | if (png_ptr == NULL) |
| 250 | return (NULL); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 251 | #ifdef PNG_USER_MEM_SUPPORTED |
| 252 | info_ptr = (png_infop)png_create_struct_2(PNG_STRUCT_INFO, |
| 253 | png_ptr->malloc_fn, png_ptr->mem_ptr); |
| 254 | #else |
| 255 | info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); |
| 256 | #endif |
| 257 | if (info_ptr != NULL) |
| 258 | png_info_init_3(&info_ptr, png_sizeof(png_info)); |
| 259 | |
| 260 | return (info_ptr); |
| 261 | } |
| 262 | |
| 263 | /* This function frees the memory associated with a single info struct. |
| 264 | * Normally, one would use either png_destroy_read_struct() or |
| 265 | * png_destroy_write_struct() to free an info struct, but this may be |
| 266 | * useful for some applications. |
| 267 | */ |
| 268 | void PNGAPI |
| 269 | png_destroy_info_struct(png_structp png_ptr, png_infopp info_ptr_ptr) |
| 270 | { |
| 271 | png_infop info_ptr = NULL; |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 272 | if (png_ptr == NULL) |
| 273 | return; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 274 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 275 | png_debug(1, "in png_destroy_info_struct"); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 276 | if (info_ptr_ptr != NULL) |
| 277 | info_ptr = *info_ptr_ptr; |
| 278 | |
| 279 | if (info_ptr != NULL) |
| 280 | { |
| 281 | png_info_destroy(png_ptr, info_ptr); |
| 282 | |
| 283 | #ifdef PNG_USER_MEM_SUPPORTED |
| 284 | png_destroy_struct_2((png_voidp)info_ptr, png_ptr->free_fn, |
| 285 | png_ptr->mem_ptr); |
| 286 | #else |
| 287 | png_destroy_struct((png_voidp)info_ptr); |
| 288 | #endif |
| 289 | *info_ptr_ptr = NULL; |
| 290 | } |
| 291 | } |
| 292 | |
| 293 | /* Initialize the info structure. This is now an internal function (0.89) |
| 294 | * and applications using it are urged to use png_create_info_struct() |
| 295 | * instead. |
| 296 | */ |
| 297 | #if defined(PNG_1_0_X) || defined(PNG_1_2_X) |
| 298 | #undef png_info_init |
| 299 | void PNGAPI |
| 300 | png_info_init(png_infop info_ptr) |
| 301 | { |
| 302 | /* We only come here via pre-1.0.12-compiled applications */ |
| 303 | png_info_init_3(&info_ptr, 0); |
| 304 | } |
| 305 | #endif |
| 306 | |
| 307 | void PNGAPI |
| 308 | png_info_init_3(png_infopp ptr_ptr, png_size_t png_info_struct_size) |
| 309 | { |
| 310 | png_infop info_ptr = *ptr_ptr; |
| 311 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 312 | if (info_ptr == NULL) |
| 313 | return; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 314 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 315 | png_debug(1, "in png_info_init_3"); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 316 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 317 | if (png_sizeof(png_info) > png_info_struct_size) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 318 | { |
| 319 | png_destroy_struct(info_ptr); |
| 320 | info_ptr = (png_infop)png_create_struct(PNG_STRUCT_INFO); |
| 321 | *ptr_ptr = info_ptr; |
| 322 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 323 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 324 | /* Set everything to 0 */ |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 325 | png_memset(info_ptr, 0, png_sizeof(png_info)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 326 | } |
| 327 | |
| 328 | #ifdef PNG_FREE_ME_SUPPORTED |
| 329 | void PNGAPI |
| 330 | png_data_freer(png_structp png_ptr, png_infop info_ptr, |
| 331 | int freer, png_uint_32 mask) |
| 332 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 333 | png_debug(1, "in png_data_freer"); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 334 | if (png_ptr == NULL || info_ptr == NULL) |
| 335 | return; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 336 | if (freer == PNG_DESTROY_WILL_FREE_DATA) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 337 | info_ptr->free_me |= mask; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 338 | else if (freer == PNG_USER_WILL_FREE_DATA) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 339 | info_ptr->free_me &= ~mask; |
| 340 | else |
| 341 | png_warning(png_ptr, |
| 342 | "Unknown freer parameter in png_data_freer."); |
| 343 | } |
| 344 | #endif |
| 345 | |
| 346 | void PNGAPI |
| 347 | png_free_data(png_structp png_ptr, png_infop info_ptr, png_uint_32 mask, |
| 348 | int num) |
| 349 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 350 | png_debug(1, "in png_free_data"); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 351 | if (png_ptr == NULL || info_ptr == NULL) |
| 352 | return; |
| 353 | |
| 354 | #if defined(PNG_TEXT_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 355 | /* Free text item num or (if num == -1) all text items */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 356 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 357 | if ((mask & PNG_FREE_TEXT) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 358 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 359 | if (mask & PNG_FREE_TEXT) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 360 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 361 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 362 | if (num != -1) |
| 363 | { |
| 364 | if (info_ptr->text && info_ptr->text[num].key) |
| 365 | { |
| 366 | png_free(png_ptr, info_ptr->text[num].key); |
| 367 | info_ptr->text[num].key = NULL; |
| 368 | } |
| 369 | } |
| 370 | else |
| 371 | { |
| 372 | int i; |
| 373 | for (i = 0; i < info_ptr->num_text; i++) |
| 374 | png_free_data(png_ptr, info_ptr, PNG_FREE_TEXT, i); |
| 375 | png_free(png_ptr, info_ptr->text); |
| 376 | info_ptr->text = NULL; |
| 377 | info_ptr->num_text=0; |
| 378 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 379 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 380 | #endif |
| 381 | |
| 382 | #if defined(PNG_tRNS_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 383 | /* Free any tRNS entry */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 384 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 385 | if ((mask & PNG_FREE_TRNS) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 386 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 387 | if ((mask & PNG_FREE_TRNS) && (png_ptr->flags & PNG_FLAG_FREE_TRNS)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 388 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 389 | { |
| 390 | png_free(png_ptr, info_ptr->trans); |
| 391 | info_ptr->trans = NULL; |
| 392 | info_ptr->valid &= ~PNG_INFO_tRNS; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 393 | #ifndef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 394 | png_ptr->flags &= ~PNG_FLAG_FREE_TRNS; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 395 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 396 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 397 | #endif |
| 398 | |
| 399 | #if defined(PNG_sCAL_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 400 | /* Free any sCAL entry */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 401 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 402 | if ((mask & PNG_FREE_SCAL) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 403 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 404 | if (mask & PNG_FREE_SCAL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 405 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 406 | { |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 407 | #if defined(PNG_FIXED_POINT_SUPPORTED) && !defined(PNG_FLOATING_POINT_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 408 | png_free(png_ptr, info_ptr->scal_s_width); |
| 409 | png_free(png_ptr, info_ptr->scal_s_height); |
| 410 | info_ptr->scal_s_width = NULL; |
| 411 | info_ptr->scal_s_height = NULL; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 412 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 413 | info_ptr->valid &= ~PNG_INFO_sCAL; |
| 414 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 415 | #endif |
| 416 | |
| 417 | #if defined(PNG_pCAL_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 418 | /* Free any pCAL entry */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 419 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 420 | if ((mask & PNG_FREE_PCAL) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 421 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 422 | if (mask & PNG_FREE_PCAL) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 423 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 424 | { |
| 425 | png_free(png_ptr, info_ptr->pcal_purpose); |
| 426 | png_free(png_ptr, info_ptr->pcal_units); |
| 427 | info_ptr->pcal_purpose = NULL; |
| 428 | info_ptr->pcal_units = NULL; |
| 429 | if (info_ptr->pcal_params != NULL) |
| 430 | { |
| 431 | int i; |
| 432 | for (i = 0; i < (int)info_ptr->pcal_nparams; i++) |
| 433 | { |
| 434 | png_free(png_ptr, info_ptr->pcal_params[i]); |
| 435 | info_ptr->pcal_params[i]=NULL; |
| 436 | } |
| 437 | png_free(png_ptr, info_ptr->pcal_params); |
| 438 | info_ptr->pcal_params = NULL; |
| 439 | } |
| 440 | info_ptr->valid &= ~PNG_INFO_pCAL; |
| 441 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 442 | #endif |
| 443 | |
| 444 | #if defined(PNG_iCCP_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 445 | /* Free any iCCP entry */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 446 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 447 | if ((mask & PNG_FREE_ICCP) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 448 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 449 | if (mask & PNG_FREE_ICCP) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 450 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 451 | { |
| 452 | png_free(png_ptr, info_ptr->iccp_name); |
| 453 | png_free(png_ptr, info_ptr->iccp_profile); |
| 454 | info_ptr->iccp_name = NULL; |
| 455 | info_ptr->iccp_profile = NULL; |
| 456 | info_ptr->valid &= ~PNG_INFO_iCCP; |
| 457 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 458 | #endif |
| 459 | |
| 460 | #if defined(PNG_sPLT_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 461 | /* Free a given sPLT entry, or (if num == -1) all sPLT entries */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 462 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 463 | if ((mask & PNG_FREE_SPLT) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 464 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 465 | if (mask & PNG_FREE_SPLT) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 466 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 467 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 468 | if (num != -1) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 469 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 470 | if (info_ptr->splt_palettes) |
| 471 | { |
| 472 | png_free(png_ptr, info_ptr->splt_palettes[num].name); |
| 473 | png_free(png_ptr, info_ptr->splt_palettes[num].entries); |
| 474 | info_ptr->splt_palettes[num].name = NULL; |
| 475 | info_ptr->splt_palettes[num].entries = NULL; |
| 476 | } |
| 477 | } |
| 478 | else |
| 479 | { |
| 480 | if (info_ptr->splt_palettes_num) |
| 481 | { |
| 482 | int i; |
| 483 | for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) |
| 484 | png_free_data(png_ptr, info_ptr, PNG_FREE_SPLT, i); |
| 485 | |
| 486 | png_free(png_ptr, info_ptr->splt_palettes); |
| 487 | info_ptr->splt_palettes = NULL; |
| 488 | info_ptr->splt_palettes_num = 0; |
| 489 | } |
| 490 | info_ptr->valid &= ~PNG_INFO_sPLT; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 491 | } |
| 492 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 493 | #endif |
| 494 | |
| 495 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 496 | if (png_ptr->unknown_chunk.data) |
| 497 | { |
| 498 | png_free(png_ptr, png_ptr->unknown_chunk.data); |
| 499 | png_ptr->unknown_chunk.data = NULL; |
| 500 | } |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 501 | |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 502 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 503 | if ((mask & PNG_FREE_UNKN) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 504 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 505 | if (mask & PNG_FREE_UNKN) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 506 | #endif |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 507 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 508 | if (num != -1) |
| 509 | { |
| 510 | if (info_ptr->unknown_chunks) |
| 511 | { |
| 512 | png_free(png_ptr, info_ptr->unknown_chunks[num].data); |
| 513 | info_ptr->unknown_chunks[num].data = NULL; |
| 514 | } |
| 515 | } |
| 516 | else |
| 517 | { |
| 518 | int i; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 519 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 520 | if (info_ptr->unknown_chunks_num) |
| 521 | { |
| 522 | for (i = 0; i < (int)info_ptr->unknown_chunks_num; i++) |
| 523 | png_free_data(png_ptr, info_ptr, PNG_FREE_UNKN, i); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 524 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 525 | png_free(png_ptr, info_ptr->unknown_chunks); |
| 526 | info_ptr->unknown_chunks = NULL; |
| 527 | info_ptr->unknown_chunks_num = 0; |
| 528 | } |
| 529 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 530 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 531 | #endif |
| 532 | |
| 533 | #if defined(PNG_hIST_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 534 | /* Free any hIST entry */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 535 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 536 | if ((mask & PNG_FREE_HIST) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 537 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 538 | if ((mask & PNG_FREE_HIST) && (png_ptr->flags & PNG_FLAG_FREE_HIST)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 539 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 540 | { |
| 541 | png_free(png_ptr, info_ptr->hist); |
| 542 | info_ptr->hist = NULL; |
| 543 | info_ptr->valid &= ~PNG_INFO_hIST; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 544 | #ifndef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 545 | png_ptr->flags &= ~PNG_FLAG_FREE_HIST; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 546 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 547 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 548 | #endif |
| 549 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 550 | /* Free any PLTE entry that was internally allocated */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 551 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 552 | if ((mask & PNG_FREE_PLTE) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 553 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 554 | if ((mask & PNG_FREE_PLTE) && (png_ptr->flags & PNG_FLAG_FREE_PLTE)) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 555 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 556 | { |
| 557 | png_zfree(png_ptr, info_ptr->palette); |
| 558 | info_ptr->palette = NULL; |
| 559 | info_ptr->valid &= ~PNG_INFO_PLTE; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 560 | #ifndef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 561 | png_ptr->flags &= ~PNG_FLAG_FREE_PLTE; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 562 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 563 | info_ptr->num_palette = 0; |
| 564 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 565 | |
| 566 | #if defined(PNG_INFO_IMAGE_SUPPORTED) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 567 | /* Free any image bits attached to the info structure */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 568 | #ifdef PNG_FREE_ME_SUPPORTED |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 569 | if ((mask & PNG_FREE_ROWS) & info_ptr->free_me) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 570 | #else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 571 | if (mask & PNG_FREE_ROWS) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 572 | #endif |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 573 | { |
| 574 | if (info_ptr->row_pointers) |
| 575 | { |
| 576 | int row; |
| 577 | for (row = 0; row < (int)info_ptr->height; row++) |
| 578 | { |
| 579 | png_free(png_ptr, info_ptr->row_pointers[row]); |
| 580 | info_ptr->row_pointers[row]=NULL; |
| 581 | } |
| 582 | png_free(png_ptr, info_ptr->row_pointers); |
| 583 | info_ptr->row_pointers=NULL; |
| 584 | } |
| 585 | info_ptr->valid &= ~PNG_INFO_IDAT; |
| 586 | } |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 587 | #endif |
| 588 | |
| 589 | #ifdef PNG_FREE_ME_SUPPORTED |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 590 | if (num == -1) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 591 | info_ptr->free_me &= ~mask; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 592 | else |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 593 | info_ptr->free_me &= ~(mask & ~PNG_FREE_MUL); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 594 | #endif |
| 595 | } |
| 596 | |
| 597 | /* This is an internal routine to free any memory that the info struct is |
| 598 | * pointing to before re-using it or freeing the struct itself. Recall |
| 599 | * that png_free() checks for NULL pointers for us. |
| 600 | */ |
| 601 | void /* PRIVATE */ |
| 602 | png_info_destroy(png_structp png_ptr, png_infop info_ptr) |
| 603 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 604 | png_debug(1, "in png_info_destroy"); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 605 | |
| 606 | png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); |
| 607 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 608 | #if defined(PNG_HANDLE_AS_UNKNOWN_SUPPORTED) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 609 | if (png_ptr->num_chunk_list) |
| 610 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 611 | png_free(png_ptr, png_ptr->chunk_list); |
| 612 | png_ptr->chunk_list=NULL; |
| 613 | png_ptr->num_chunk_list = 0; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 614 | } |
| 615 | #endif |
| 616 | |
| 617 | png_info_init_3(&info_ptr, png_sizeof(png_info)); |
| 618 | } |
| 619 | #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ |
| 620 | |
| 621 | /* This function returns a pointer to the io_ptr associated with the user |
| 622 | * functions. The application should free any memory associated with this |
| 623 | * pointer before png_write_destroy() or png_read_destroy() are called. |
| 624 | */ |
| 625 | png_voidp PNGAPI |
| 626 | png_get_io_ptr(png_structp png_ptr) |
| 627 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 628 | if (png_ptr == NULL) |
| 629 | return (NULL); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 630 | return (png_ptr->io_ptr); |
| 631 | } |
| 632 | |
| 633 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
| 634 | #if !defined(PNG_NO_STDIO) |
| 635 | /* Initialize the default input/output functions for the PNG file. If you |
| 636 | * use your own read or write routines, you can call either png_set_read_fn() |
| 637 | * or png_set_write_fn() instead of png_init_io(). If you have defined |
| 638 | * PNG_NO_STDIO, you must use a function of your own because "FILE *" isn't |
| 639 | * necessarily available. |
| 640 | */ |
| 641 | void PNGAPI |
| 642 | png_init_io(png_structp png_ptr, png_FILE_p fp) |
| 643 | { |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 644 | png_debug(1, "in png_init_io"); |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 645 | if (png_ptr == NULL) |
| 646 | return; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 647 | png_ptr->io_ptr = (png_voidp)fp; |
| 648 | } |
| 649 | #endif |
| 650 | |
| 651 | #if defined(PNG_TIME_RFC1123_SUPPORTED) |
| 652 | /* Convert the supplied time into an RFC 1123 string suitable for use in |
| 653 | * a "Creation Time" or other text-based time string. |
| 654 | */ |
| 655 | png_charp PNGAPI |
| 656 | png_convert_to_rfc1123(png_structp png_ptr, png_timep ptime) |
| 657 | { |
| 658 | static PNG_CONST char short_months[12][4] = |
| 659 | {"Jan", "Feb", "Mar", "Apr", "May", "Jun", |
| 660 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"}; |
| 661 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 662 | if (png_ptr == NULL) |
| 663 | return (NULL); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 664 | if (png_ptr->time_buffer == NULL) |
| 665 | { |
| 666 | png_ptr->time_buffer = (png_charp)png_malloc(png_ptr, (png_uint_32)(29* |
| 667 | png_sizeof(char))); |
| 668 | } |
| 669 | |
| 670 | #if defined(_WIN32_WCE) |
| 671 | { |
| 672 | wchar_t time_buf[29]; |
| 673 | wsprintf(time_buf, TEXT("%d %S %d %02d:%02d:%02d +0000"), |
| 674 | ptime->day % 32, short_months[(ptime->month - 1) % 12], |
| 675 | ptime->year, ptime->hour % 24, ptime->minute % 60, |
| 676 | ptime->second % 61); |
| 677 | WideCharToMultiByte(CP_ACP, 0, time_buf, -1, png_ptr->time_buffer, 29, |
| 678 | NULL, NULL); |
| 679 | } |
| 680 | #else |
| 681 | #ifdef USE_FAR_KEYWORD |
| 682 | { |
| 683 | char near_time_buf[29]; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 684 | png_snprintf6(near_time_buf, 29, "%d %s %d %02d:%02d:%02d +0000", |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 685 | ptime->day % 32, short_months[(ptime->month - 1) % 12], |
| 686 | ptime->year, ptime->hour % 24, ptime->minute % 60, |
| 687 | ptime->second % 61); |
| 688 | png_memcpy(png_ptr->time_buffer, near_time_buf, |
| 689 | 29*png_sizeof(char)); |
| 690 | } |
| 691 | #else |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 692 | png_snprintf6(png_ptr->time_buffer, 29, "%d %s %d %02d:%02d:%02d +0000", |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 693 | ptime->day % 32, short_months[(ptime->month - 1) % 12], |
| 694 | ptime->year, ptime->hour % 24, ptime->minute % 60, |
| 695 | ptime->second % 61); |
| 696 | #endif |
| 697 | #endif /* _WIN32_WCE */ |
| 698 | return ((png_charp)png_ptr->time_buffer); |
| 699 | } |
| 700 | #endif /* PNG_TIME_RFC1123_SUPPORTED */ |
| 701 | |
| 702 | #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ |
| 703 | |
| 704 | png_charp PNGAPI |
| 705 | png_get_copyright(png_structp png_ptr) |
| 706 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 707 | png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ |
| 708 | return ((png_charp) "\n libpng version 1.2.38 - July 16, 2009\n\ |
| 709 | Copyright (c) 1998-2009 Glenn Randers-Pehrson\n\ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 710 | Copyright (c) 1996-1997 Andreas Dilger\n\ |
| 711 | Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.\n"); |
| 712 | } |
| 713 | |
| 714 | /* The following return the library version as a short string in the |
| 715 | * format 1.0.0 through 99.99.99zz. To get the version of *.h files |
| 716 | * used with your application, print out PNG_LIBPNG_VER_STRING, which |
| 717 | * is defined in png.h. |
| 718 | * Note: now there is no difference between png_get_libpng_ver() and |
| 719 | * png_get_header_ver(). Due to the version_nn_nn_nn typedef guard, |
| 720 | * it is guaranteed that png.c uses the correct version of png.h. |
| 721 | */ |
| 722 | png_charp PNGAPI |
| 723 | png_get_libpng_ver(png_structp png_ptr) |
| 724 | { |
| 725 | /* Version of *.c files used when building libpng */ |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 726 | png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 727 | return ((png_charp) PNG_LIBPNG_VER_STRING); |
| 728 | } |
| 729 | |
| 730 | png_charp PNGAPI |
| 731 | png_get_header_ver(png_structp png_ptr) |
| 732 | { |
| 733 | /* Version of *.h files used when building libpng */ |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 734 | png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 735 | return ((png_charp) PNG_LIBPNG_VER_STRING); |
| 736 | } |
| 737 | |
| 738 | png_charp PNGAPI |
| 739 | png_get_header_version(png_structp png_ptr) |
| 740 | { |
| 741 | /* Returns longer string containing both version and date */ |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 742 | png_ptr = png_ptr; /* Silence compiler warning about unused png_ptr */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 743 | return ((png_charp) PNG_HEADER_VERSION_STRING |
| 744 | #ifndef PNG_READ_SUPPORTED |
| 745 | " (NO READ SUPPORT)" |
| 746 | #endif |
| 747 | "\n"); |
| 748 | } |
| 749 | |
| 750 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
| 751 | #ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
| 752 | int PNGAPI |
| 753 | png_handle_as_unknown(png_structp png_ptr, png_bytep chunk_name) |
| 754 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 755 | /* Check chunk_name and return "keep" value if it's on the list, else 0 */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 756 | int i; |
| 757 | png_bytep p; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 758 | if (png_ptr == NULL || chunk_name == NULL || png_ptr->num_chunk_list<=0) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 759 | return 0; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 760 | p = png_ptr->chunk_list + png_ptr->num_chunk_list*5 - 5; |
| 761 | for (i = png_ptr->num_chunk_list; i; i--, p -= 5) |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 762 | if (!png_memcmp(chunk_name, p, 4)) |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 763 | return ((int)*(p + 4)); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 764 | return 0; |
| 765 | } |
| 766 | #endif |
| 767 | |
| 768 | /* This function, added to libpng-1.0.6g, is untested. */ |
| 769 | int PNGAPI |
| 770 | png_reset_zstream(png_structp png_ptr) |
| 771 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 772 | if (png_ptr == NULL) |
| 773 | return Z_STREAM_ERROR; |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 774 | return (inflateReset(&png_ptr->zstream)); |
| 775 | } |
| 776 | #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ |
| 777 | |
| 778 | /* This function was added to libpng-1.0.7 */ |
| 779 | png_uint_32 PNGAPI |
| 780 | png_access_version_number(void) |
| 781 | { |
| 782 | /* Version of *.c files used when building libpng */ |
| 783 | return((png_uint_32) PNG_LIBPNG_VER); |
| 784 | } |
| 785 | |
| 786 | |
| 787 | #if defined(PNG_READ_SUPPORTED) && defined(PNG_ASSEMBLER_CODE_SUPPORTED) |
| 788 | #if !defined(PNG_1_0_X) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 789 | /* This function was added to libpng 1.2.0 */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 790 | int PNGAPI |
| 791 | png_mmx_support(void) |
| 792 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 793 | /* Obsolete, to be removed from libpng-1.4.0 */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 794 | return -1; |
| 795 | } |
| 796 | #endif /* PNG_1_0_X */ |
| 797 | #endif /* PNG_READ_SUPPORTED && PNG_ASSEMBLER_CODE_SUPPORTED */ |
| 798 | |
| 799 | #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) |
| 800 | #ifdef PNG_SIZE_T |
| 801 | /* Added at libpng version 1.2.6 */ |
| 802 | PNG_EXTERN png_size_t PNGAPI png_convert_size PNGARG((size_t size)); |
| 803 | png_size_t PNGAPI |
| 804 | png_convert_size(size_t size) |
| 805 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 806 | if (size > (png_size_t)-1) |
| 807 | PNG_ABORT(); /* We haven't got access to png_ptr, so no png_error() */ |
| 808 | return ((png_size_t)size); |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 809 | } |
| 810 | #endif /* PNG_SIZE_T */ |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 811 | |
| 812 | /* Added at libpng version 1.2.34 and 1.4.0 (moved from pngset.c) */ |
| 813 | #if defined(PNG_cHRM_SUPPORTED) |
| 814 | #if !defined(PNG_NO_CHECK_cHRM) |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 815 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 816 | /* |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 817 | * Multiply two 32-bit numbers, V1 and V2, using 32-bit |
| 818 | * arithmetic, to produce a 64 bit result in the HI/LO words. |
| 819 | * |
| 820 | * A B |
| 821 | * x C D |
| 822 | * ------ |
| 823 | * AD || BD |
| 824 | * AC || CB || 0 |
| 825 | * |
| 826 | * where A and B are the high and low 16-bit words of V1, |
| 827 | * C and D are the 16-bit words of V2, AD is the product of |
| 828 | * A and D, and X || Y is (X << 16) + Y. |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 829 | */ |
| 830 | |
| 831 | void png_64bit_product (long v1, long v2, unsigned long *hi_product, |
| 832 | unsigned long *lo_product) |
| 833 | { |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 834 | int a, b, c, d; |
| 835 | long lo, hi, x, y; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 836 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 837 | a = (v1 >> 16) & 0xffff; |
| 838 | b = v1 & 0xffff; |
| 839 | c = (v2 >> 16) & 0xffff; |
| 840 | d = v2 & 0xffff; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 841 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 842 | lo = b * d; /* BD */ |
| 843 | x = a * d + c * b; /* AD + CB */ |
| 844 | y = ((lo >> 16) & 0xffff) + x; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 845 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 846 | lo = (lo & 0xffff) | ((y & 0xffff) << 16); |
| 847 | hi = (y >> 16) & 0xffff; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 848 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 849 | hi += a * c; /* AC */ |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 850 | |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 851 | *hi_product = (unsigned long)hi; |
| 852 | *lo_product = (unsigned long)lo; |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 853 | } |
Patrick Scott | a0bb96c | 2009-07-22 11:50:02 -0400 | [diff] [blame^] | 854 | |
The Android Open Source Project | 4215dd1 | 2009-03-09 11:52:12 -0700 | [diff] [blame] | 855 | int /* private */ |
| 856 | png_check_cHRM_fixed(png_structp png_ptr, |
| 857 | png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, |
| 858 | png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, |
| 859 | png_fixed_point blue_x, png_fixed_point blue_y) |
| 860 | { |
| 861 | int ret = 1; |
| 862 | unsigned long xy_hi,xy_lo,yx_hi,yx_lo; |
| 863 | |
| 864 | png_debug(1, "in function png_check_cHRM_fixed"); |
| 865 | if (png_ptr == NULL) |
| 866 | return 0; |
| 867 | |
| 868 | if (white_x < 0 || white_y <= 0 || |
| 869 | red_x < 0 || red_y < 0 || |
| 870 | green_x < 0 || green_y < 0 || |
| 871 | blue_x < 0 || blue_y < 0) |
| 872 | { |
| 873 | png_warning(png_ptr, |
| 874 | "Ignoring attempt to set negative chromaticity value"); |
| 875 | ret = 0; |
| 876 | } |
| 877 | if (white_x > (png_fixed_point) PNG_UINT_31_MAX || |
| 878 | white_y > (png_fixed_point) PNG_UINT_31_MAX || |
| 879 | red_x > (png_fixed_point) PNG_UINT_31_MAX || |
| 880 | red_y > (png_fixed_point) PNG_UINT_31_MAX || |
| 881 | green_x > (png_fixed_point) PNG_UINT_31_MAX || |
| 882 | green_y > (png_fixed_point) PNG_UINT_31_MAX || |
| 883 | blue_x > (png_fixed_point) PNG_UINT_31_MAX || |
| 884 | blue_y > (png_fixed_point) PNG_UINT_31_MAX ) |
| 885 | { |
| 886 | png_warning(png_ptr, |
| 887 | "Ignoring attempt to set chromaticity value exceeding 21474.83"); |
| 888 | ret = 0; |
| 889 | } |
| 890 | if (white_x > 100000L - white_y) |
| 891 | { |
| 892 | png_warning(png_ptr, "Invalid cHRM white point"); |
| 893 | ret = 0; |
| 894 | } |
| 895 | if (red_x > 100000L - red_y) |
| 896 | { |
| 897 | png_warning(png_ptr, "Invalid cHRM red point"); |
| 898 | ret = 0; |
| 899 | } |
| 900 | if (green_x > 100000L - green_y) |
| 901 | { |
| 902 | png_warning(png_ptr, "Invalid cHRM green point"); |
| 903 | ret = 0; |
| 904 | } |
| 905 | if (blue_x > 100000L - blue_y) |
| 906 | { |
| 907 | png_warning(png_ptr, "Invalid cHRM blue point"); |
| 908 | ret = 0; |
| 909 | } |
| 910 | |
| 911 | png_64bit_product(green_x - red_x, blue_y - red_y, &xy_hi, &xy_lo); |
| 912 | png_64bit_product(green_y - red_y, blue_x - red_x, &yx_hi, &yx_lo); |
| 913 | |
| 914 | if (xy_hi == yx_hi && xy_lo == yx_lo) |
| 915 | { |
| 916 | png_warning(png_ptr, |
| 917 | "Ignoring attempt to set cHRM RGB triangle with zero area"); |
| 918 | ret = 0; |
| 919 | } |
| 920 | |
| 921 | return ret; |
| 922 | } |
| 923 | #endif /* NO_PNG_CHECK_cHRM */ |
| 924 | #endif /* PNG_cHRM_SUPPORTED */ |
The Android Open Source Project | 893912b | 2009-03-03 19:30:05 -0800 | [diff] [blame] | 925 | #endif /* defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) */ |